| 摘要 |
The optical device for detecting rotational parameters comprises a disk (47) which is provided with at least one annular part (48) formed by radial zones (51) which can transmit light, and radial zones (53) which can absorb light; the radial zones (51) which can transmit light and the radial zones (53) which can absorb light are circumferentially alternated; also comprising a light source (43), a light guide (30), and at least one photo-sensitive element (45). The light is transmitted in the light guide (1,30) by a one-piece element (2,31) and the optical detection device is disposed in a tight housing which is isolated from both the outer environment and the space between the inner (74) and outer rings (72).
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